John w



. W. HYATT.

andA AImng "Tubes '5 Apparatus for v ring Cores `of Celluloid' :undother Pla'sti l* terial.:

Patented May 28,`18'I8.' ,4

lNvNTmH N. Fm FHOTO-IJTHOQRAPHER, WASHIKGNN. D C.

the material to the core. The plug B is pro- UNITED STATES .PATENTOEETOEJOHN W. HYATT, OF NEWARK, NEW lJERsEY, AssIGNOR TO THE OELLLOIDMANUFACTURING COMPANY, OE NEW YORK, N. Y.

*IMPROVEMENT IN APPARATUS FUR COVERING CDRES AND FONMING TUBES 0FCELLULOID AND OTHE ATERIALS.

specification forming part of Letters Patent No.. 204,227, dated May 2e,iets application nieu April 27,1878.

To all whom it may concern;

Be it known that l, JOHN'W. HYATT, of Newark, in the county of Essex andState of New Jersey, have invented a new and useful- Improvement inNozzles for Covering Cores with and Forming Tubes lof PlasticComposition, of which the following is a sp'ecioation, reference beinghad to the accompanying' drawings. y

The invention relates to a means of coating a core or bar of wood orother substance with plastic composition; and consists in a nozzle,through which the material is fed to a chamber having an annular space,which increases at its apex in width proportionately to the distance ofits periphery from the point of supply, thus proportionately reducingand equalizing the friction of the material in its passage from thepoint of supply to its contact with the core. The essential elements ofthe invention are an inlet, through which the core, snugly fitting,passes into the space which contains the coating material, being thereincovered, whence it passes out through an outlet of such size as toaccurately fit the coated core.

The supply of the material is furnished into a space arrangedeccentrically to the outlet through which the core passes in beingcoated, this to the end that the flow of the material may be soproportionately retarded by friction as to furnish a relatively similarsupply to all sides of the core.

Figure 1 is a vertical central longitudinal section of the device inquestion. Fig. 2 is an end View of the same, the internal constructionbeing shown in dotted lines. Fig. 3 is a plan view of the head of theplug F. Fig. 4 is a side elevation of same.

In the accompanyingdrawings, A represents the nozzle, provided with asuitable channel, a, and having its shank attached by a thread, or inany other suitable manner, to the base of a stuffing-machine. (Notshown.) B is a plug securely and adjustably attached to the nozzle A,for the purpose of advancing or retracting the plug, and accordinglyreducing or permitting an increase in the ilow'of vided with the vinletD, of such size as to accurately correspond with the transverse sec-,tion of the core, opposite the channel in which,

and having a coincidentA axis therewith, yis provided the outletE, whichis of such size as to accurately correspond with the transverse sectionof the coated core, being therefore larger than the inlet D.

The outlet E is located in the plug F,Which is secured to the nozzle Aby means of the screws b, and terminates in the circular head H, which,as to itsy apex, is beveled eccentrically to the mouth of the outlet E,being reduced onits edge in a proportionately greater degree as saidedge is distant from the mouth of the channel a. The diameter of thehead H is less than the adjacent parts of the plug F, and does notextend so as to impinge the plug B, thus forming the space L.

The periphery of the head H is nearly vertical at the point opposite thechannel a, whence it is provided with a constantly-increasing bevel toIthe vpoint oppositethat aforesaid, where the bevel reaches its maximum.'Thus an eccentric annular chamber, I, is formed about the sides ofthehead H. The outlet is therefore central as to 'the base of the head,

H and eccentric as to its upper surface.

To heat the device, andthus keep the material in a plastic condition,there is provided the pipe X, which supplies a current of steam or othersuitable heating agent to the steamband Z, which encompasses the deviceat about its center, one end ofthe pipe Z serving as an inlet and theother as an outlet for the steam. The operation is as follows: Thenozzle being attached to the stufiing-machine provided with suitablematerial, the machine is operated. The material iiows into the channela, and thence into the annular chamber I, and also into the space L. Therod or core is now introduced into the inlet D, which prevents the flowof the material through the inlet, and causes a current toward theoutlet E, which takes up the rod and gradually draws it through thespace L, thus coating it evenly on all sides. Now, as the materialpasses through the space L it comes in contact with acorrespondingly-reduced surface in proportion as it becomes removed fromthe channel a; hence, the friction being reduced at each succeedingpoint, the iiow of material to the core is correspondingly equalized,being the same at the point nearest to and farthest from the mouth ofthe channel a, as well as at all the other intermediate points. Garemust be taken not to so advance the plug B as to reduce the space L somuch that the friction between the outlet and the channel a Would be sogreat as to prevent the proper supply at the point on the outlet nextopposite to the channel a. At the same time care should be exercised notto so far retract the plug B as to inordinately enlarge the space L, andthus permit an excessive supply at the point directly opposite the mouthof the channel.

It is to be carefully noted that the greater the space between the edgeof the outlet E and of the upper part of the head H the greater thefriction encountered by the material, and hence, the plug B beingretracted, there would be a freer supply over the narrow than the Widersurfaces.

It is plain that by the above-described operation cores of any materialmay be readily coated, and that such cores may be of consid-` erablelength; also, that they may be withdrawn from their covering, whichwould remain tubes or tubular structures of almost any desired length.

Preferably the cores should be removed before the covering has fullydried, as the shrinkage might retard their removal; also, the coresshould, in this operation of forming tubes, be coated with some suitablelubricant to facilitate their being withdrawn.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. A machine for coating surfaces with plastic composition, in which theoutlet occupies a position to reach which the iiow of material isequalized by proportionate friction with the space over which it passes,substantially as specified.

2. The outlet E, located eccentrically to the upper surface of the headH, substantially as set forth.

3. The head H, beveled substantiallyu as specified.

4. The plug B, adjustable with relation to the head H, substantially asexpressed.

5. The combination A of the head H and a suitable adjustable surface,arranged with relation to increasing or reducing the frictionof thematerial passing over the upper surface of the head H, substantially asset forth.

6. The plug F, provided with the outlet E and head H, in combinationwith the plugB, provided with the inlet D, sub forth.

7. A machine for coating a surface with plastic composition. in whichthe flow of-material to the core or surface to be coated is equalized bythe proportionate surface over which it passes in reaching the core,substantially as set forth.

8. A machine for coating a continuous core with plastic composition, inwhich the core is sustained at all points by the evenly-distributed iiowofthe material to it, which iiow also causes its progress through thechamber con# taining the coating composition, substantially as setforth.

9. The process of forming tubes of plastic composition, which consistsin feeding `the composition in equal quantities to all sides of a core,which core is withdrawn from the com-` position, leaving the tubularcoating, substantially as set forth.

In testimony that I claim the foregoing improvement in nozzles forcovering cores with a and forming tubes of plastic composition, as.

above described, I have hereunto set my hand this 5th day of March,1878.

JOHN W. HYATT.

Witnesses:

SAMUEL S. TIFFANY, WILLIAM R. SANDS.

